create_constraint_block

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only says 'Create', which implies a mutation, but gives no details about side effects, requirements on parent_id, idempotency, or any post-conditions. For a creation tool, one would expect at least a note that a new element is added to the model and what happens if the parent is invalid. This is insufficient.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, concise sentence with no wasted words. It front-loads the core action ('Create a SysML ConstraintBlock') and includes the key contextual detail (parent_id). It is perfectly sized for the information it conveys.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple creation tool with two parameters, the description is minimal but lacks context about prerequisites, such as whether parent_id must reference a valid container, or how this fits into the broader model hierarchy. It also provides no usage guidance relative to the many sibling tools. While the output schema exists (so return values are covered), the description alone leaves an agent uncertain about when and how to call it correctly. More context is needed.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It does clarify that parent_id is the parent under which the ConstraintBlock is created, which gives semantic meaning to that parameter. However, it does not explain what type of element parent_id should be (e.g., a Package or Block) or any constraints on the name. The name parameter is self-explanatory. The description adds minimal value beyond the schema, so a 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb ('Create') and a specific resource ('SysML ConstraintBlock') and mentions the parent context ('under parent_id'). It is clear and not a tautology, though it does not explicitly differentiate from sibling create tools like create_block or create_interface_block. The resource name itself provides some distinction, so this is a solid 4.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no guidance on when to use this tool versus the many other creation tools in the sibling list. No alternatives are mentioned, and no conditions or prerequisites are stated. The agent must infer usage solely from the name and description, which is inadequate for a suite with dozens of creation tools.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.